/lib/udev/rules.d/80-networking.rules is in udev 215-17+deb8u7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | SUBSYSTEM=="net", RUN+="net.agent"
SUBSYSTEM=="atm", RUN+="dsl-modem.agent"
|